Rachel Bilson and Hayden Christensen at 'Superheroes: Fashion and Fantasy' Costume Institute Gala at The Metropolitan Museum of Art - Departures. New York City, USA - 05.05.08

The couple, who met on the set of movie Jumper in 2006, became engaged in December (08), while staying at Christensen's family home in Vancouver, Canada, according to reports.

A source tells America's Star magazine, "He gave her a diamond ring, and she accepted without hesitation. Everyone's so excited. Hayden's family adores Rachel - his sisters even helped him pick out the ring."

The insider alleges their nuptials are likely to take place in Canada because Los Angeles-born Bilson "loves it there", adding, "She's a down-to-earth girl - and she's brought out the best in Hayden."

A wedding date has yet to be set.

Bilson's representative has refused to confirm or deny the reports, stating, "I don't comment on my clients' personal lives."

Source: WENN